When you present reasons why you believe in something, you argue for it. For example, writing an editorial to your local newspaper is a great way to argue for the creation of a dog park in your town.
prominent or conspicuous:
commanding respect because of great age or impressive dignity
rigorously binding or exacting; strict; severe:
to give tacit approval to:
to bring or restore to a state of peace or tranquility, or to reduce to a state of submission